uncertain
adjective
un·cer·tain
ˌən-ˈsər-tᵊn
1
3
: indefinite, indeterminate
the time of departure is uncertain
4
: not certain to occur : problematical
his success was uncertain
5
: not reliable : untrustworthy
an uncertain ally
uncertainly
adverb
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Merriam-Webster unabridged
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